Oil way sealing device for power shifting transmission

Abstract

The oil way sealing device comprises a cover plate, a center sealing pipe and a plurality of positioning circular pipes are arranged on one side face of the cover plate, the center sealing pipe is located in the center of the cover plate, and the positioning circular pipes are symmetrically arranged in pairs relative to the central axis of the center sealing pipe; a sealing ring is arranged on the outer side wall of the center sealing pipe, a transparent oil level observation window coaxial with the center sealing pipe is integrally arranged on the cover plate, a protruding circular ring is arranged on the outer side wall of the positioning circular pipe in the circumferential direction, a pair of U-shaped grooves are formed in the side wall of the opening end of the positioning circular pipe, and a pair of plate-shaped handles are integrally arranged on the cover plate. The oil way sealing device is reasonable in overall structure and high in sealing stability, can be rapidly mounted and dismounted without additional tools, is not prone to being lost after being dismounted, and can visually and rapidly observe the height of oil in a speed change oil tank shell through the oil level observation window at low cost.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile parts and relates to an oil circuit sealing device, in particular to an oil circuit sealing device for a power shift transmission. Background Art

[0002] Power shift transmission is widely used in construction machinery such as graders, bulldozers and loaders because of its excellent characteristics of uninterrupted shifting power. Power shift transmission is a large transmission with electro-hydraulic control. Hydraulic oil circuit is an important part of power shift transmission. According to the connection form of oil circuit, hydraulic circuit can be divided into pipeline connection form and non-pipeline connection form. The so-called pipeline connection type is to connect various hydraulic components through oil pipes and pipe joints to form a hydraulic circuit.

[0003] The transmission oil tank of the power shift transmission Figure 1 As shown, it includes a transmission oil tank housing 10, an oil hole 11 is opened on one side wall of the transmission oil tank housing 10, and a plurality of mounting threaded holes 12 are arranged on the transmission oil tank housing 10 outside the oil hole 11. Part of the oil circuit of the power shift transmission needs to be connected with the oil pipe of the whole vehicle through the oil hole 11 on the transmission oil tank housing 10. The power shift transmission needs to seal the oil hole 11 when it is not connected to the oil pipe of the whole vehicle. After being shipped to the main engine factory, the oil hole seal is released and connected to the oil pipe of the whole vehicle through a pipe joint.

[0004] At present, threaded plugs are usually used to seal the oil holes 11 on the transmission oil tank housing 10, but special tools are required for disassembly of the threaded plugs, which is time-consuming and laborious to operate, and due to their small size, they are easily lost after disassembly. If the oil level in the transmission oil tank housing 10 needs to be observed, the existing method is to connect an electronic oil level gauge to the transmission housing 10, but the electronic oil level gauge needs to be powered on all the time, so it is necessary to design a wiring harness connection and calibrate the software control program, which makes the transmission design process complicated and cumbersome, and the selection of the oil level gauge requires the determination of the range and the use environment, which is costly. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an oil circuit sealing device for a power shift transmission, which can solve the technical problems of the existing oil circuit sealing devices being difficult to disassemble, having high costs for observing the oil level, and being small in size and easy to lose.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve the above problems:

[0007] An oil circuit sealing device for a power shift transmission, characterized in that it comprises a cover plate, a central sealing tube and a plurality of positioning circular tubes are arranged on one side of the cover plate, the central sealing tube is located at the center of the cover plate, and the plurality of positioning circular tubes are distributed on the outside of the central sealing tube and are symmetrically arranged in pairs with respect to the central axis of the central sealing tube;

[0008] An annular groove is circumferentially provided on the outer side wall of the central sealing tube, a sealing ring is arranged in the annular groove, a transparent oil level observation window is integrally arranged on the cover plate, and the oil level observation window and the central sealing tube are coaxially arranged.

[0009] The present invention also includes the following technical features:

[0010] The diameter of the oil level observation window is the same as the inner diameter of the central sealing tube.

[0011] A raised ring is circumferentially arranged on the outer side wall of the positioning circular tube.

[0012] A pair of U-shaped grooves symmetrically arranged with respect to the central axis of the positioning circular tube are provided on the side wall of the opening end of the positioning circular tube.

[0013] The length of the pair of U-shaped grooves is greater than the distance between the raised ring and the open end of the positioning circular tube.

[0014] The outer edge of the opening end of the central sealing tube is provided with a chamfer, and the outer edges of the opening ends of the plurality of positioning circular tubes are also provided with a chamfer.

[0015] The inner diameter of the central sealing tube 2 is 31 mm to 33 mm, and the outer diameter of the central sealing tube 2 is 35 mm to 36 mm; the outer diameter of the positioning circular tube 3 is 10 mm to 10.5 mm.

[0016] The number of the positioning circular tubes is 4.

[0017] A pair of plate-shaped handles are integrally arranged on the cover plate, and the pair of handles are respectively arranged at two vertical ends of the cover plate and are arranged in the same plane as the cover plate.

[0018] The cover plate, the central sealing tube, the positioning circular tube, the raised circular ring and the oil level observation window are all made of transparent engineering plastics.

[0019] Compared with the prior art, the present invention has the following technical effects:

[0020] (I) The oil circuit sealing device has a reasonable overall structure and is easy to operate. It can be quickly installed and disassembled without tools and is not easy to lose after disassembly. The sealing ring installed on the central sealing tube can completely seal the oil hole through compression deformation, ensuring that the oil of the power shift transmission is safely stored in the transmission oil tank housing during transportation.

[0021] (II) The transparent oil level observation window of the oil circuit sealing device can observe the oil height in the transmission oil tank housing at low cost, intuitively and quickly, so as to let the operator know when to proceed to the next operation. The upper and lower edges of the oil level observation hole serve as the upper and lower limits of the oil level. According to the observed oil level, oil is added or released to make the oil level in the transmission oil tank housing at a reasonable position.

[0022] (III) The setting of the positioning circular tube corresponding to the mounting threaded hole in the oil circuit sealing device can prevent the oil circuit sealing device from rotating with the central sealing tube as the axis, thereby reducing the possibility of damage to the sealing ring and improving the sealing reliability of the multifunctional oil circuit sealing device. The U-shaped groove allows the positioning circular tube to be easily inserted into the mounting threaded hole. The interference fit between the raised circular ring and the mounting threaded hole allows the positioning circular tube to be stably assembled in the mounting threaded hole, thereby improving the stability of the overall oil circuit sealing device.

[0023] (IV) The provision of a pair of handles in the oil circuit sealing device facilitates the operator to quickly install and disassemble the oil circuit sealing device, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the transmission oil tank structure of a power shift transmission.

[0025] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0026] Figure 3 It is a side view of the overall structure of the present invention.

[0027] Figure 4 This is an assembly diagram of the present invention. Figure 1 .

[0028] Figure 5 This is an assembly diagram of the present invention. Figure 2 .

[0029] The meaning of each number in the figure is:

[0030] 1. Cover plate, 2. Center sealing tube, 3. Positioning round tube, 4. Annular groove, 5. Sealing ring, 6. Oil level observation window, 7. Raised ring, 8. U-shaped groove, 9. Handle, 10. Transmission oil tank housing, 11. Oil hole, 12. Mounting threaded hole.

[0031] The specific contents of the present invention are further explained in detail below in conjunction with embodiments. DETAILED DESCRIPTION

[0032] In accordance with the above technical scheme, specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical scheme of this application fall within the protection scope of the present invention.

[0033] In the present invention, unless otherwise specified, directional words such as "upper", "lower", "left", "right", etc. are usually defined based on the drawings in the corresponding accompanying drawings, and "inside" and "outside" refer to the inside and outside of the corresponding component outline.

[0034] Example:

[0035] This embodiment provides an oil circuit sealing device for a power shift transmission, such as Figures 2 to 5 As shown, it includes a cover plate 1, a central sealing tube 2 and a plurality of positioning circular tubes 3 are arranged on one side of the cover plate 1, the central sealing tube 2 is located at the center of the cover plate 1, and the plurality of positioning circular tubes 3 are distributed on the outside of the central sealing tube 2 and are symmetrically arranged in pairs with the central axis of the central sealing tube 2;

[0036] An annular groove 4 is circumferentially formed on the outer wall of the central sealing tube 2 , a sealing ring 5 is arranged in the annular groove 4 , and a transparent oil level observation window 6 is integrally provided on the cover plate 1 , and the oil level observation window 6 is coaxially arranged with the central sealing tube 2 .

[0037] In this embodiment, the central sealing tube 2 is inserted into the oil hole 11 on the transmission oil tank housing 10 to block the oil hole 11. The rubber sealing ring 5 is interference fit with the oil hole 11 to ensure the sealing performance of the blockage. The annular groove 4 prevents the sealing ring 5 from moving on the central sealing tube 2. The plurality of positioning circular tubes 3 are plugged in one by one with the mounting threaded holes 12 around the oil hole 11 to prevent the cover plate 1 from rotating with the central sealing tube 2 as the axis under the action of external force, thereby reducing the possibility of damage to the sealing ring 5 and preventing the central sealing tube 2 from falling off from the oil hole 11. To improve the sealing reliability of the oil circuit sealing device, the oil level observation window 6 is coaxially arranged with the center sealing tube 2, and the oil level in the transmission oil tank housing 10 can be checked through the transparent oil level observation window 6. During use, the oil circuit sealing device can be quickly removed as a whole by holding the edge of the cover plate 1. During installation, hold the edge of the cover plate 1, make the center sealing tube 2 correspond to the oil hole 11, and the positioning round tube 3 correspond to the installation threaded hole 12, so that the oil hole 11 can be quickly sealed. The cover plate 1 is large in size and is not easy to lose after being disassembled.

[0038] As a preferred scheme of this embodiment, the diameter of the oil level observation window 6 in this embodiment is the same as the inner diameter of the center sealing tube 2, the upper edge of the oil level observation window 6 is the upper limit of the oil level in the transmission oil tank housing 10, and the lower edge of the oil level observation window 6 is the lower limit of the oil level in the transmission oil tank housing 10. The oil in the transmission oil tank housing 10 is located between the upper and lower limits, that is, the reasonable position of the oil. When the oil level in the transmission oil tank housing 10 is lower than the lower limit, the oil circuit sealing device can be removed and oil can be added through the oil hole 11. When the oil level in the transmission oil tank housing 10 is higher than the upper limit, the excess oil can be discharged by removing the oil circuit sealing device.

[0039] As a preferred solution of this embodiment, a raised ring 7 is circumferentially arranged on the outer wall of the positioning circular tube 3 in this embodiment. The raised ring 7 is interference fit with the mounting threaded hole 12 to prevent the oil circuit sealing device from falling out due to external vibration, thereby improving the reliability of the installation and sealing.

[0040] Furthermore, a pair of U-shaped grooves 8 symmetrically arranged with respect to the central axis of the positioning circular tube 3 are provided on the side wall of the open end of the positioning circular tube 3, and the open end of the positioning circular tube 3 is released from the mounting threaded hole 12. Due to the existence of the U-shaped groove 8, the open end of the positioning circular tube 3 can have a certain amount of compression, which facilitates the positioning circular tube 3 to enter the mounting threaded hole 12.

[0041] As a preferred solution of this embodiment, the length of a pair of U-shaped grooves 8 in this embodiment is greater than the distance between the raised ring 7 and the open end of the positioning circular tube 3. The raised ring 7 is arranged on the outside of the U-shaped groove 8 and can be inserted into the mounting threaded hole 12 at the same time as the positioning circular tube 3, and effectively outwardly connected to the inner wall of the mounting threaded hole 12, thereby improving the stability of the installation.

[0042] As a preferred solution of this embodiment, the outer edge of the open end of the center sealing tube 2 in this embodiment is provided with a chamfer, and the outer edges of the open ends of the multiple positioning circular tubes 3 are also provided with chamfers to avoid hard collisions with the edges of the oil hole 12 and the mounting threaded hole 12 during installation and disassembly.

[0043] As a preferred solution of this embodiment, the inner diameter of the center sealing tube 2 in this embodiment is 31mm-33mm, providing a large-diameter observation space for the oil level observation window 6, and the outer diameter of the center sealing tube 2 is 35mm-36mm, matching the inner diameter of the oil hole 11;

[0044] The outer diameter of the positioning circular tube 3 is 10 mm to 10.5 mm, which matches the inner diameter of the mounting threaded hole 12 .

[0045] As a preferred solution of this embodiment, the number of positioning circular tubes 3 in this embodiment is 4. Four mounting threaded holes 12 are usually provided on the outside of the oil hole 11 of the transmission oil tank housing 10 to improve the stability of the installation. The four positioning circular tubes 3 can correspond to the mounting threaded holes 12 one by one. When the cover plate 1 is subjected to external force, no displacement will occur, thereby improving the stability of the oil circuit sealing device and ensuring the sealing effect.

[0046] As a preferred solution of this embodiment, a pair of plate-shaped handles 9 are integrally provided on the cover plate 1 in this embodiment. The pair of handles 9 are respectively provided at the vertical ends of the cover plate 1 and are provided in the same plane as the cover plate 1, so that the operator can hold the handles 9 with both hands for installation or disassembly.

[0047] As a preferred solution of this embodiment, the cover plate 1, handle 9, center sealing tube 2, positioning circular tube 3, raised ring 7 and oil level observation window 6 are all made of transparent engineering plastics, which can more intuitively observe the oil level in the transmission oil tank housing 10.

[0048] In actual operation of this embodiment:

[0049] Installation of the oil circuit sealing device: The operator holds a pair of handles 9 with both hands to push the oil circuit sealing device as a whole toward the transmission oil tank housing 10. After the center sealing tube 2 is aligned with the oil hole 11 and multiple positioning circular tubes 3 are aligned with the mounting threaded holes 12 one by one, the oil circuit sealing device continues to be pushed forward, and finally the center sealing tube 2 is inserted into the oil hole 11, the positioning circular tube 3 is inserted into the mounting threaded hole 12, the sealing ring 5 is in close contact with the inner wall of the oil hole 11, and the raised ring 7 is in close contact with the inner wall of the mounting threaded hole 12. After confirming that the overall oil circuit sealing device is stable and not offset, the installation is completed.

[0050] Disassembly of the oil circuit sealing device: the operator holds a pair of handles 9 with both hands and pulls out the entire oil circuit sealing device in a direction away from the transmission oil tank housing 10.

Claims

1. An oil circuit sealing device for a power shift transmission, characterized in that: The invention comprises a cover plate (1), wherein a central sealing tube (2) and a plurality of positioning circular tubes (3) are arranged on one side of the cover plate (1), the central sealing tube (2) is located at the center of the cover plate (1), and the plurality of positioning circular tubes (3) are distributed on the outside of the central sealing tube (2) and are symmetrically arranged in pairs with respect to the central axis of the central sealing tube (2); An annular groove (4) is provided on the outer wall of the central sealing tube (2) in the circumferential direction, a sealing ring (5) is provided in the annular groove (4), a transparent oil level observation window (6) is integrally provided on the cover plate (1), and the oil level observation window (6) and the central sealing tube (2) are coaxially arranged.

2. The oil circuit sealing device for a power shift transmission according to claim 1, characterized in that: The diameter of the oil level observation window (6) is the same as the inner diameter of the central sealing tube (2).

3. The oil circuit sealing device for a power shift transmission as claimed in claim 2, characterized in that: A raised ring (7) is circumferentially arranged on the outer side wall of the positioning circular tube (3).

4. The oil circuit sealing device for a power shift transmission as claimed in claim 3, characterized in that: A pair of U-shaped grooves (8) symmetrically arranged about the central axis of the positioning circular tube (3) are provided on the side wall of the open end of the positioning circular tube (3).

5. The oil circuit sealing device for a power shift transmission as claimed in claim 4, characterized in that: The length of the pair of U-shaped grooves (8) is greater than the distance between the raised circular ring (7) and the open end of the positioning circular tube (3).

6. The oil circuit sealing device for a power shift transmission according to claim 1, characterized in that: The outer edge of the opening end of the central sealing tube (2) is provided with a chamfer, and the outer edges of the opening ends of the plurality of positioning circular tubes (3) are also provided with a chamfer.

7. The oil circuit sealing device for a power shift transmission according to claim 1, characterized in that: The inner diameter of the central sealing tube (2) is 31 mm to 33 mm, and the outer diameter of the central sealing tube (2) is 35 mm to 36 mm; the outer diameter of the positioning circular tube (3) is 10 mm to 10.5 mm.

8. The oil circuit sealing device for a power shift transmission according to claim 1, characterized in that: The number of the positioning circular tubes (3) is 4.

9. The oil circuit sealing device for a power shift transmission according to claim 1, characterized in that: A pair of plate-shaped handles (9) are integrally provided on the cover plate (1), and the pair of handles (9) are respectively arranged at two vertical ends of the cover plate (1) and are arranged in the same plane as the cover plate (1).

10. The oil circuit sealing device for a power shift transmission according to any one of claims 1 to 9, characterized in that: The cover plate (1), handle (9), central sealing tube (2), positioning circular tube (3), raised circular ring (7) and oil level observation window (6) are all made of transparent engineering plastics.

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